
Niwa Nagashige (May 11, 1571 – April 30, 1637) was a Japanese daimyo who served the Oda clan. Nagashige was the eldest son of Niwa Nagahide and married an adopted daughter of Oda Nobunaga. He took part in his first campaign in 1583, assisting his father in the battles against Shibata Katsuie. In the Battle of Nagakute, at the age of thirteen, Nagashige led a troop of Niwa clan in the place of his father, who was ill.